Telephone-signal.



DE FORREST CHAMPEON TELEPHONE SIGNAL. APPLlCATlON FILFD SEPT. 16, 1914.

1,177,485. Patented Mar. 28, 1916.

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TELEPHONE SIGNAL.

APPLICATION 111120 SEPT. 16. 1914.

1,177,485. Patented Mar. 28, 1916.

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scope of the claims.

UNITED STATES PATEN'I OFFICE.

DE FORREST OHAMPEON, 0F HO UL'IO N, MAINE.

TELEPHONE-SIGNAL.

Specification of Letters Patent. Patented lIar. 2S, 1916.

Application filed. September 16, 1914. Serial No. 862,064.

1 '0 all whom it may concern:

Be it known that I, DE FoRREsT CHAM- PEoN, a, citizen of the United States, residing at Houlton, in the county of Aroostook and State of Maine, have invented new and useful Improvements in Telephone- Signals, of which the following is a specification.

This invention relates to improvements in signaling devices for telephones and has particular application to an automatic local signal.

In carrying out the present invention, it is my purpose to provide an automatic local signal for telephone sets which will be found especially useful on party lines whereby the calling and called subscribers will be advised when a third party listens in.

It is also my purpose to provide an audible signal of the class described which will be located in the transmitter of the telephone set and controlled by the receiver arm so that when the latter is relieved of the weight of the receiver and moves upwardly, incident to the removal of the receiver therefrom, the signal in the transmitter will be actuated and the sound waves therefrom sent over the transmission line, the latter having been previously closed by the upward movement of the receiver arm.

A further object of my invention is to provide a signaling device of the type set forth which will embrace the desired features of simplicity, efliciency and durability, which may be installed and maintained at a minimum expense and which will operate effectively under all conditions and whereby the central exchange operator of a party line telephone system will be advised audibly of the particular calling subscriber.

With the above and otherobjects in view, the invention consists in the construction, combination and arrangement of parts hereinafter set forth in and falling within the 'In the accompanying drawings Figure 1 is a diagrammatic sectional view of 'asignaling device constructed in accordance with the present invention and installed in a telephone set. Fig. 2 is a cross sectional view on the line 22 of Fig. 1. YFig. 3 is a similar view on the line 3-3 of Fig. 1. Fig. 4 isa perspective view of a detail of the inventlon. Fig. 5 is a sectional view through the transmitter showing the. audible signal carried thereby. Fig. 6 is a view in edge elevation of the audible signal removed from the transmitter.

In the drawings, I have shown atelephone set comprising the usual standard 1, receiver 2 and transmitter 3. Formed in the standard 1 at an appropriate point is a vertical slot 4 and projecting through the slot 4 and capable of vertical movement therein is an arm 5 having the outer end thereof formed to provide a for z 6 designed to hold the'receiver 2 and the inner end thereof connected with a vertical rod 7 slidably mounted within vertically alining openings formed, in superposed supporting brackets 8, 8. Secured to the under surface'of each supporting bracket and lying in a plane parallel with the bracket 8. Depending from the right angular portion 11 of the arm 10 is a spring jack 1:2 connected in the transmission circuit, while on the upper extremity of the rod? and insulated therefrom-is a plug 13 adapted to enter the jack 12 and close the transmission circuit. A coiled contractile spring 14:

has one end fastened to the under surface ofth'e upper bracket 8 and the lower end secured to the arm 5 carrying the receiver and, upon the removal of thereceiver from the hook 6, the spring 14 reacts and slides the rod 7' upwardly thereby engaging the plug 'l with the jack 12 so as to close the transmission circuit whereby conversation may be carried on through the transmltter 3 and receiver 2;

Projecting upwardly from the I lower bracket 8 parallel with the rod is an arm 15 carrying a plate formed of alternate sections of conducting material 17 and insulating material 18, the sections of conducting material being connected to one another by means of a common strip 19, while the sections of insulatingmaterial are similarly connected by a common strip 20. The upper end of the arm 15 is bent at right angles to itself as at 21, such bent portion lies in a plane parallel with the lower bracket 8 and, formed in the right angular portion 21 of the arm 15 and is mounted for sliding movement a shank 22 having the lower end thereof connected with the piston of a dash pct 23 and the upper end formed with an eye 24: to'which is fastened one extremity of a coiled contractile spring 25, such spring having the opposite end thereof secured to a bracket .26 carried by the arm 10. Fixed to the shank 22 and projecting outwardly therefrom at right angles thereto is a contact finger 27 adapted to wipe over the plate 16 and normally dis- ,posed at the lower end of such plate. In order to hold the shank 22 in lowered positionaga-inst the action of the spring 25 a suitable form of catch-is provided. In the present instance, a dog 28 is pivoted: upon the right angular portion 21 of the'arm- 15 and normally engages a depression 29 formed in the adj acent portion of the shank 22,such dog acting to hold the shank against upward sliding movement under the actionof the spring '25 Connected-with the shank 22 adjacent to-the point ofconnection of the contact finger 27 and projecting outwardly from such shank in adirection opposite from the contact finger is a lug 30, while iformed on the'rod '7 and normally engaging the lug 30 is a lug 31, while connected with the rod 7 above the lug 31 is a finger 32 designed to engage the dog 28 and hold the latter normally: the depression 29.

Under normalconditions, that is, when the telephone set is out of service, the rod 7 and shank 22 are inlowered positions and held in such positions against the action of the springsl]: and 25 respectively. 'When the armfi is relieved of the Weightof the re ceiver2 the spring 14 reacts and so slides the rod 7 upwardly thereby engaging the plug 13 with the jack 12 and closing the transmission circuit. In the upward movement of the rod 7 the finger 32 disengages thedog 28-and the lug 31 disengages the lug 30 and contacts'with the dog 28 simulta neously with the plug 13 entering the j ack 12.

As the lug 31 engages the dog'28 the latter is swungabout its pivotal connection with the right angular portion 21 of the arm 15 and moved out of the recess or depression 29 in the shank 22 thereby releasing the latter. Upon the release of the shank 22 the spring '25 reacts and slides the shank upwardly whereby the finger '27 rides over the plate 16 and engages the conducting sections 17 successively or oneafter the-other. As the shank moves upwardly under the action of the spring 25 the dash pot 23 retards the motion of the shank so that-the contact finger 27 will ride intoand-out of engagement with the successive conducting sections 16 slowly and in an even and uniform manner. When :ltandin: the downward movement of the rod 7 the lug 31 in engagement with the lug 30 on the shank 31 restores the latter to nor mal position, the shank sliding downwardly rapidly under the weight of the receiver.

34 designates an audible signal which, in the present instance, is in the form of an interrupter disposed within a casing 35 having one side adjacent to one end thereof formed with an .interiorly threaded socket 36 and the opposite side formed with an outwardly exteriorly threaded nipple 37 a lining axially with the socket 36. The extension on the nipple 37 is threaded into the transmitter casing inadvance -of the. sound transmitting diaphragm, while the mouth piece of the transmitter is threaded into 'the socket 36. The interrupter 34 is connected in an electric circuit 38 including a suitable source of energy as a battery 39 and having the terminals thereof connected:

with the contact finger 27 and the common strip 19 respectively. By means of this construction, it. will be seen that as the contact finger 27 moves. over the conducting sections of the-plate 16 inthe :upward moveanentof' the shank 22, the circuit 38 will be interrupted a certain number of times, corresponding with the number of insulated sections 18, thereby energizing the audible signal '33 in the transmitter and deenergizing such signal in accordance with the making andbreaking of the circuitunder the action of the-finger. 27 and-plate 16. As the signal 34:- is operated after the transmission circuit is closed, the-sound waves setup by such signal are transmitted to the central stationand as the: number, or arrangement, or both, of" the segments of the. plate 16. of

each station differs from: the segments on and-are. removable and interchangeable to facilitate the changingof the signal when *desired. .When the called subscriber removes the receiver from the arm the mechanism controlledbysuch arm is'actuatedas I previously described and the local audible signal 33 actuated a number .of times correspondingwwith the'number of conducting segments on the plate so that the sound waves are transmitted over the transmission'line to the calling subscribers instrument whereby the calling subscriber. is notified that the called subscriber is on'the line. Should a third party attempt to listen in the interrupter or audible signal of such partywill operate and: thereby; advise the parties using the line of, the third partys presence.

'Fromthe foregoing description taken} in connection with the: accompanying drawings, the construction, mode of operation and manner of employing my improved signaling device will be readily apparent.

It will be seen that I have provided a signaling device which will be found especially useful in party line telephone systems and whereby two parties using the line will be automatically notified when the third party listens in.

While I have herein shown and described one preferred form of my invention by way of illustration, I wish it to be understood that I do not limit or confine myself to the precise details of construction herein described and delineated, as modification and variation may be made within the scope of the claims without departing from the spirit of the invention.

I claim 1. In a telephone signal, the combination with the receiver arm and transmitter, of an electroresponsive audible signal in juxtaposition to said transmitter, a local circuit including said signal, a circuit closer in said circuit constructed to intermittently close and open the circuit a predetermined number of times in the operation of said circuit closer, means holding said circuit closer normally in open position, and means operable from said arm in the movement thereof upon the removal of the receiver and succeeding the closing of the transmission circuit to release said holding means.

2. In a telephone signal, the combination with the receiver arm and transmitter, of an electroresponsive audible signal in juxtaposition to said transmitter, a local circuit including said signal, a circuit closer in said circuit constructed to intermittently close and open the circuit a predetermined number of times in the operation of said circuit closer, means holding said circuit closer normally in open position, means operable from said arm in the movement thereof upon the removal of the receiver and succeeding the closing of the transmission circuit to release said holding means, a spring for actuating said circuit closer upon the release of said holding means, and means for retarding the movement of said circuit closer under the action of said spring.

3. In a telephone signal, the combination with the receiver arm and transmitter, of an electroresponsive audible signal in juxtaposition to said transmitter, a local circuit for said signal, a circuit closer connected in said circuit and comprising alternate sections of insulating material and conducting mate rial, a shank disposed in juxtaposition to said sections and capable of vertical sliding material, a shank disposed in juxtaposition to said sections and capable of vertical sliding movement, means holding said shank normally in lowered position and operable upon the removal of the receiver from said arm to release said shank, and means for sliding said shank upon the release thereof.

5. In a telephone signal, the combination with the receiver arm and transmitter, of an electroresponsive audible signal in juxtaposition to said transmitter, a local circuit for said signal, a circuit closer connected in said circuit and comprising alternate sections of insulating material and conducting material, a shank disposed in juxtaposition to said sections and capable of vertical sliding movement, means holding said shank normally in lowered position and operable upon the removal ofthe receiver from said arm to release said shank, means'for sliding said shank upon the release thereof, and means operable upon the restoring of the receiver upon said arm to restore said shank to normal position.

6. Ina telephone signal, the combination with the receiver arm and transmitter, of an electroresponsive audible signal in juxtaposition to said transmitter, a local circuit for said signal, a circuit closer connected in said circuit and comprising alternate sections of insulating material and conducting material, a shank disposed in juxtaposition to said sections and capable of'vertical sliding movement, means holding said shank normally in lowered position and operable upon the removal of the receiver from said arm to release said shank, means for sliding said shank upon the release thereof, and means for retarding the movement of said shank under the action of the operating means thereof.

In testimony whereof I aflix my signature in presence of two witnesses.

DE FORREST OI-IAMPEON. Witnesses:

LEONARD A. Prnnon, JULIA I. SPEER.

copies of this patent may be obtained for five cents each, by addressing the "Commissioner of Patents, Washington, D. G. 

